Question

The main excretory product in human beings is _________.

Answer 1

Hint:The excretory system of humans consists of a pair of ureters, a pair of kidneys, urinary bladder and urethra.

Complete answer:
Before we find the answer, let us look into the human excretory system first. Excretion is the process by which waste products are removed from the body. The various organs involved in the process of excretory system are,
Pair of ureters - It is thin muscular tubes which come out of each kidneys and carry urine to the bladder from urine.
Pair of kidneys - They are bean shaped structures and are located on either side of the back bone. It consists of nephrons, capsule, and henle’s loop.
Urinary bladder - It is a sac like structure which helps in storage of urine.
Urethra - It is a tube like structure which arises from the urinary bladder and helps in expelling urine out of the body.

Excretion is the process of removal of toxic wastes from the body of an organism. The major wastes produced by us are:- Carbon dioxide and Urea. Carbon dioxide is produced by the process of respiration and urea is produced by the decomposition of unused proteins in the liver.In humans, the main excretory product is Urea.

Additional information:The steps involved in excretion are as follows,
Glomerular filtration - During this process, excess fluid and waste products are filtered out from blood in kidneys
Tubular reabsorption - Here, absorption of molecules like sodium, glucose etc takes place. Absorption of glucose and sodium is via an active process, but absorption of water is via a passive process
Secretion - It is the process by which extra potassium ions, ammonia, hydrogen ions are secreted out of the body

Note: Different animals have different excretory products. For example,
>The excretory product of spider and cockroach is uric acid.
>The excretory product of paramecium and amoeba is ammonia.
>The excretory product of birds is uric acid.
>The excretory product of humans is urea.